Who has been buying Japan Ecosystem Co., Ltd. stock?

4 distinct investors have filed 7 disclosed large-shareholding filings in Japan Ecosystem Co., Ltd. (9249), most recently on 2025-08-15. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Japan Ecosystem Co., Ltd. have?

Japan Ecosystem Co., Ltd. has 7 buy-side and 21 sell-side disclosures on record, covering ¥1.2B ($7.8M) in total reported value, spanning 2021-10-11 to 2025-08-15.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Japan Ecosystem Co., Ltd. 9249

Company

日本エコシステム株式会社Japan Ecosystem Co., Ltd.

Investors

Buys

Total Value

¥1.2B ($7.8M)

Avg Return

+140.23%

Last Filing

2025-08-15

Japan Ecosystem Co., Ltd. (9249) has 7 disclosed large-shareholding filings and 21 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥1.2B ($7.8M) in reported transaction value. The earliest filing StockDrifts holds for Japan Ecosystem Co., Ltd. is dated 2021-10-11; the most recent is 2025-08-15. Across these filings the average return since disclosure is +140.23%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2025-08-15	SELL	unknown	松島穣 Minoru Matsushima	strategic	609.0K	¥1,573	-6.0%	¥3M ($18K)
2025-08-15	SELL	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	3.3M	¥1,573	-6.0%	¥16M ($106K)
2025-08-15	SELL	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	1.9M	¥1,573	-6.0%	¥10M ($62K)
2025-08-15	SELL	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	3.3M	¥1,573	-6.0%	¥16M ($106K)
2025-08-15	SELL	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	1.9M	¥1,573	-6.0%	¥10M ($62K)
2025-08-15	SELL	unknown	松島穣 Minoru Matsushima	strategic	609.0K	¥1,573	-6.0%	¥3M ($18K)
2025-08-04	SELL	unknown	松島穣 Minoru Matsushima	strategic	609.0K	¥1,540	-8.3%	¥3M ($17K)
2025-08-04	SELL	unknown	松島穣 Minoru Matsushima	strategic	609.0K	¥1,540	-8.3%	¥3M ($17K)
2025-08-04	SELL	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	3.3M	¥1,540	-8.3%	¥16M ($104K)
2025-08-04	SELL	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	1.9M	¥1,540	-8.3%	¥9M ($61K)
2025-08-04	SELL	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	3.3M	¥1,540	-8.3%	¥15M ($95K)
2025-08-04	SELL	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	1.9M	¥1,540	-8.3%	¥9M ($61K)
2025-03-26	SELL	unknown	松島穣 Minoru Matsushima	strategic	203.0K	¥1,590	-4.8%	¥24M ($154K)
2025-03-26	SELL	unknown	松島穣 Minoru Matsushima	strategic	203.0K	¥1,590	-4.8%	¥64M ($415K)
2025-03-26	SELL	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	1.1M	¥1,590	-4.8%	¥18M ($113K)
2025-03-26	SELL	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	650.0K	¥1,590	-4.8%	¥10M ($66K)
2025-03-26	SELL	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	1.1M	¥1,590	-4.8%	¥129M ($832K)
2025-03-26	SELL	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	650.0K	¥1,590	-4.8%	¥76M ($490K)
2025-03-07	SELL	unknown	松島穣 Minoru Matsushima	strategic	203.0K	¥1,536.67	-8.5%	¥90M ($580K)
2025-03-07	SELL	unknown	松島穣 Minoru Matsushima	strategic	203.0K	¥1,536.67	-8.5%	¥90M ($580K)
2025-03-07	BUY	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	650.0K	¥1,536.67	-	¥999M ($6.4M)
2025-03-07	BUY	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	1.1M	¥1,536.67	-	¥1.7B ($10.9M)
2025-03-07	BUY	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	650.0K	¥1,536.67	-	¥999M ($6.4M)
2025-03-07	BUY	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	1.1M	¥1,536.67	-	¥1.7B ($10.9M)
2024-02-09	SELL	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	121.5K	¥1,398.33	-19.2%	¥39M ($250K)
2024-01-31	BUY	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	150.0K	¥1,395	-	-
2024-01-31	BUY	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	150.0K	¥1,395	-	-
2023-09-01	BUY	subscription	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	150.0K	¥610	+173.3%	¥92M ($590K)
2021-10-11	BUY	unknown	松島穣 Minoru Matsushima	strategic	241.0K	¥636.67	+161.8%	¥153M ($990K)
2021-10-11	BUY	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	1.1M	¥636.67	+161.8%	¥700M ($4.5M)
2021-10-11	BUY	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	650.0K	¥636.67	+161.8%	¥414M ($2.7M)
2021-10-11	BUY	unknown	松福株式会社 Matsufuku Co., Ltd.	strategic	1.1M	¥636.67	+161.8%	¥700M ($4.5M)
2021-10-11	BUY	unknown	オクヤホールディングス株式会社 Okuya Holdings Co., Ltd.	strategic	650.0K	¥636.67	+161.8%	¥414M ($2.7M)
2021-10-11	BUY	unknown	松島穣 Minoru Matsushima	strategic	241.0K	¥636.67	+161.8%	¥153M ($990K)

Frequently asked questions

Who has been buying Japan Ecosystem Co., Ltd. stock?: 4 distinct investors have filed 7 disclosed large-shareholding filings in Japan Ecosystem Co., Ltd. (9249), most recently on 2025-08-15. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Japan Ecosystem Co., Ltd. have?: Japan Ecosystem Co., Ltd. has 7 buy-side and 21 sell-side disclosures on record, covering ¥1.2B ($7.8M) in total reported value, spanning 2021-10-11 to 2025-08-15.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.